text messaging was the most widely used mobile data service, with 74% of all mobile phone users worldwide, or 2.4 billion out of 3.3 billion phone subscribers, at the end of 2007 being active users of the Short Message Service.In countries such as Finland, Sweden and Norway, over 85% of the population use SMS.Don’t be a thief—save your grade, use Bib Me™ and give credit to those who deserve it!
Hence there is no "development" in the US in mobile messaging service.
The GSM in the US had to use a frequency allocated for private communication services (PCS) – what the ITU frequency régime had blocked for DECT – Digital Enhanced Cordless Telecommunications – 1000-feet range picocell, but survived.
American Personal Communications (APC), the first GSM carrier in America, provided the first text-messaging service in the United States.
Sprint Telecommunications Venture, a partnership of Sprint Corp. made the initial phone-call to launch the network, calling Mayor Kurt Schmoke in Baltimore.
This was part of ISDN (Integrated Services Digital Network) and since GSM is based on this, made its way to the mobile phone.
Messages could be sent and received on ISDN phones, and these can send SMS to any GSM phone.Almost every time, the messages contained fewer than 160 characters, thus giving the basis for the limit one could type via text messaging.Under SS7, it is a "state" with a 160 character data, coded in the ITU-T "T.56" text format, that has a "sequence lead in" to determine different language codes, and may have special character codes that permits, for example, sending simple graphs as text.The service is referred to by different colloquialisms depending on the region.It may simply be referred to as a "text" in North America, the United Kingdom, Australia, New Zealand and the Philippines, an "SMS" in most of mainland Europe, or an "MMS" or "SMS" in the Middle East, Africa, and Asia.It has grown beyond alphanumeric text to include multimedia messages (known as MMS) containing digital images, videos, and sound content, as well as ideograms known as emoji (happy faces ,sad faces ,and other icons).